Hello, I'm using a quad-core system with windows xp home, 4 gigs of ram, Sonar 6 Producer, and the Edirol FA-66 for my audio converter. After loading some softsynths into sonar, I will sometimes lose sound from them while in the middle of playing. The sound will just disappear. I'll deactivate and reactivate the audio engine within Sonar, but that doesn't restore the sound from the synths. I end up having to close the project and reopening it to get the synthss sound back. If I have more than one different softsynth loaded into a project, the sound disappears with all of them. I'm wondering if my FA-66 has problems with a quad-core system. Pure speculation, of course. Any thoughts? Omar Binno www.omarbinno.com